Stoker type firing equipment for use with city refuse incinerator

Claim 1

A stoker type firing apparatus for use with a city refuse incinerator comprising: a step type stoker for receiving refuse to be incinerated, said stoker formed by combining movable fire grates which move back and forth and fixed fire grates, across which said refuse moves alternately in a step like manner, said movable fire grates sliding over said fixed fire grates to move said refuse thereacross; gas injectors at said aforementioned fixed fire grates to inject low temperature inert gas onto refuse while burning on the stoker, said fixed grates having box shapes, being hollow, and being coupled to a source of low temperature inert gas, wherein said fixed grates have gas injection holes at front walls thereof so that the fixed fire grates receive inert gas which is injected from said gas injection holes so that they are utilized as said gas injectors; a dust collector for receiving and treating combustion waste gas exhausted from a waste heat boiler of said incinerator to thereby purify said waste gas; and, a pipe system for channelling said purified waste gas to said hollow fixed grates so that it can be utilized as said low temperature inert gas.